Tool coupling.



UNIT D STATES PATENT OFFICE.

JOSEPH I-IEMINGWAY, OF SPEARFISH, SOUTH DAKOTA, ASSIGNOR TO THE UNIVERSAL FUEL COMPANY, OF CHICAGO, ILLINOIS.

PROCESS OF MAKING COKE.

SPECIFICATION forming part of Letters Patent No. 637,255, dated November 21, 1899.

7 Application filed October 16, 1899. Serial No. 733,749. (No specimens.)

To all whom it ntcty concern.-

Be it known that I, J OSEPH HEMINGWAY, a citizen of the United States, residing at S pearfish, Lawrence county, South Dakota, have invented certain new and useful Improvements in Processes of Making Coke, of which the following is a specification.

The object of my invention is more particularly to devise a method of treating sulfurous xo coals and coals that have heretofore been regarded as non-cokable for commercial purposes, so that they can be coked in quantity and at a reasonable expense and so that the coke secured will be of a superior quality and applicable for all the uses to which good qualities of coke are now applied; and my invention also has for its objectimproving and expediting the coking of coals now coked by the ordinary processes; and my process consists in the operations and modes of procedure hereinafter described and claimed.

In the drawings, Figure 1 represents a plan view ofa convenient form of coking plant to carry out my process, with the coking-ovens shown in section taken on line 1 of Fig. 2.

Fig. 2 is a side elevation. Fig. 3 is a longitudinal sectional elevation of the blast-heating furnace; and Fig. 4 is a vertical section of a coking-oven, showing the movement and 0 circulation of the gases.

In describing the process or mode of procedure that I have found from months of actual Work in coking sulfurous coals and coals that are generally regarded as non-cokable for commercial purposes and coals that are coked according to the present methods to be the best and the most successful I desire to say at the start that I do not intend in this application to attach special importance to therefore be employed for the interior lining of the coking-oven. This necessity grows out of the fact that in my process or mode of procedure I raise the temperature in the cok-' ing-oven to a point two or three thousand degrees above what is ordinarily employed in the coking operation as generally practiced at the present time. This temperature reaches, I should say, in many cases a point exceeding 4,000 Fahrenheit. Under the high temperature employed by me I secure not only rapid generation and evolution of the gases contained in the coal, but a breaking up and disintegration of their elements and a con-' version of the volatile carbons into a fixed form, so that they are deposited upon the coke in large quantities and form constituents of and substantial additions to the coke product. This increase in the quantity of fixed carbon is not secured by the methods of coking in 5 general use, where the temperature is insuflicient to effect the separation of the constitu-' cuts of the gases and the conversion of the volatile carbons into fixed form.

.To secure the increased temperature employed by me, I have found it necessary to provide a blast heated outside of the coking oven itself-an extraneouslyheated blast. As a convenient means of heating the blast a furnace B may be employed, having an auxiliary arrangement of open brickwork C,

preferably inclosed in the same wall that incloses the furnace. The open brickwork may be constructed of fire-brick and in the usual way. It operates to preserve equality in the temperature of the blast and is intended to be heated and maintained at as high a temperature as the blast driven through and in conair has passed through the burning fuel it is Patented Nov. 2!, I899.

G. H. HEPFNER.

TOOL COUPLING.

(Application filed Aug. 4. 1899.)

{No Model.)

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